[NSRCA-discussion] lipo flight pack question

[Keith Black]

Eddie, how much did the battery cost and how much did the plane cost?
  ----- Original Message ----- 
  From: Eddie Batchelor 
  To: 'NSRCA Mailing List' 
  Sent: Wednesday, November 21, 2007 12:32 PM
  Subject: [NSRCA-discussion] lipo flight pack question


  OK all you E guru's. Please help me out here.

  I inadvertently left my switch on after flying last weekend. The flight pack with a 2s lipo and regulator sat on for 9 days and drained the lipo. When I checked the voltage on the 2s 850mah lipo it read under 2.6 volts and dropping under load. Without the load it rose to just above 3 volts. SO obviously I drained my 7.4v 2s pack quite dead/flat/ ka-put. L

   

  I tried to recharge it and none of the lipo chargers I have would even allow it to begin charging. Then thinking I had nothing to loose at this point I put it on my nicad charger for a few moments and got the voltage up some. ( Yes I know this normally is a NO-NO and I did it very cautiously, outside.) 

  Then the Accucyle Elite accepted it as a 2s pack and began charging. I eventually charged back over 900 mah into this pack rated as 850mah.

   

  I have not had time to cycle it yet but I will to see what capacity It can output & recharge.

   

  NOW , my question to the collective wisdom is.  Assuming the pack cycles within acceptable output IE (800mah or more), Do you think the pack is useable or should I just trash it. How much damage could have been done by slowly draining  the pack flat. I think it wouldn't be as severe as draining a pack flat under load( in flight).

   

  I doubt I could ever feel comfortable flying my pattern plane with it, but would it be usable for sport flying.

   

  Just curious

   

  Thanks

  Eddie B



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